This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Describe how rectangular sheet metal ducts are joined. What will be an ideal ... (Read 116 times)

Alygatorr01285

  • Hero Member
  • *****
  • Posts: 564
on: Jul 26, 2018
Describe how rectangular sheet metal ducts are joined.
 
  What will be an ideal response?

Question 2

Describe how to install a dovetail takeoff fitting on a ductboard trunk.
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

elyse44

  • Sr. Member
  • ****
  • Posts: 319
Reply #1 on: Jul 26, 2018
Answer to Question 1

Rectangular ducts are joined by S-locks and drives cleats. S locks are used on the larger duct dimension, usually the top and bottom. The shorter dimensions are joined by drive cleats. The duct edges are turned back, the drive cleat slips over the edges and pulls the duct together. These are driven down with a mallet; thus the name, drive cleat. These joints sealed with UL 181-A mastic or UL 181-A tape and mastic.

Answer to Question 2

Mark the hole on the trunk
Cut an insulating ring out of fiberduct, slide over the takeoff and tape in place. Coat the flange portion of the takeoff with mastic.
Insert the dovetail tabs into the hole. Reach in and bend over the dovetails.


Alygatorr01285

  • Member
  • Posts: 564
Reply 2 on: Jul 26, 2018
Excellent

scottmt

  • Member
  • Posts: 322
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

Did you know?

The U.S. Pharmacopeia Medication Errors Reporting Program states that approximately 50% of all medication errors involve insulin.

Did you know?

In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.

Did you know?

The longest a person has survived after a heart transplant is 24 years.

Did you know?

There are more sensory neurons in the tongue than in any other part of the body.

All oily shop cloths should be stored in a metal container equipped with a lid to help prevent ... All oily shop cloths should be stored in a metal container equipped with a lid to help prevent ...
Oil molecules cling to metal surfaces but easily slide against each other. Oil molecules cling to metal surfaces but easily slide against each other.
Creating a tent for turning from prone to supine or vice versa. Pin one side of the sheet against ... Creating a tent for turning from prone to supine or vice versa. Pin one side of the sheet against ...
The material safety data sheet (MSDS) for sulfuric acid showing the detailed technical information ... The material safety data sheet (MSDS) for sulfuric acid showing the detailed technical information ...
The material safety data sheet (MSDS) for sulfuric acid showing the detailed technical information ... The material safety data sheet (MSDS) for sulfuric acid showing the detailed technical information ...
How to find the volume and surface area a rectangular prism How to find the volume and surface area a rectangular prism
Video: Major Elements in Biological Molecules: Lipids

For a complete list of videos, visit our video library